Air purifier



FIG. 1 is a perspective front view of an embodiment of an air purifier.

FIG. 2 is a front view of the air purifier of FIG. 1.

FIG. 3 is a rear view of the air purifier of FIG. 1.

FIG. 4 is a right side view of the air purifier of FIG. 1.

FIG. 5 is a left side view of the air purifier of FIG. 1.

FIG. 6 is a top view of the air purifier of FIG. 1; and,

FIG. 7 is a bottom view of the air purifier of FIG. 1. 

CLAIM The ornamental design for an air purifier, as shown and described. 